Heading to Vegas next week, coupon help

[patswin]

Headed out to Vegas next week for a few days of gambling. I picked up the book last week on Amazon. Any advice on which are the best coupons to use for gambling? I see many matchplay coupons for many casinos and would like to know which ones are the best ones to use if i was to visit a few casinos to use the coupons? I am talking the gaming ones only,not food or rooms as i already have booked my hotels. I may have some free time during my stay to try to use some coupons and am looking for advice on which ones are the better ones to use.

Thanks